linux-imx

/*

 * sma cpu5 watchdog driver

 *

 * Copyright (C) 2003 Heiko Ronsdorf <hero@ihg.uni-duisburg.de>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 *

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/types.h>

#include <linux/errno.h>

#include <linux/miscdevice.h>

#include <linux/fs.h>

#include <linux/ioport.h>

#include <linux/timer.h>

#include <linux/completion.h>

#include <linux/jiffies.h>

#include <linux/io.h>

#include <linux/uaccess.h>

#include <linux/watchdog.h>

​

/* adjustable parameters */

​

static int verbose;

static int port = 0x91;

static int ticks = 10000;

static DEFINE_SPINLOCK(cpu5wdt_lock);

​

#define PFX         "cpu5wdt: "

​

#define CPU5WDT_EXTENT          0x0A

​

#define CPU5WDT_STATUS_REG      0x00

#define CPU5WDT_TIME_A_REG      0x02

#define CPU5WDT_TIME_B_REG      0x03

#define CPU5WDT_MODE_REG        0x04

#define CPU5WDT_TRIGGER_REG     0x07

#define CPU5WDT_ENABLE_REG      0x08

#define CPU5WDT_RESET_REG       0x09

​

#define CPU5WDT_INTERVAL    (HZ/10+1)

​

/* some device data */

​

static struct {

    struct completion stop;

    int running;